Andrew Lundquist Resigns as a Director of Pioneer Natural Resources

Pioneer Natural Resources Company (NYSE:PXD) ('Pioneer? or 'the
Company?) today announced that Andrew Lundquist has resigned his
position as a director of Pioneer to join the Executive Leadership Team
of ConocoPhillips Company. Mr. Lundquist joined the Pioneer Board of
Directors in 2004 and served on the Company′s Compensation and
Management Development Committee and Nominating and Corporate Governance
Committee.

Scott D. Sheffield, Chairman and CEO, stated, 'On behalf of Pioneer and
its Board, I want to thank Andrew for his many years of service to
Pioneer. He has been an invaluable resource to the Board as it faced
periods of change, growth, successes and challenges, and the Company has
benefited greatly from his professionalism, dedication, wisdom and
experience. His insight and leadership will be missed.?

Pioneer is a large independent oil and gas exploration and production
company, headquartered in Dallas, Texas, with operations in the United
States. For more information, visit Pioneer′s website at www.pxd.com.

Pioneer Natural Resources

Investors

Frank
Hopkins, 972-969-4065

or

Eric Pregler, 972-969-5756

or

Josh
Jones, 972-969-5822

or

Media and Public Affairs

Susan
Spratlen, 972-969-4018

or

Suzanne Hicks, 972-969-4020